Pitman



(No Model.)

I. HROGERS.

' PITMANI No. 895,850. Patented Jan. 8, 1889.

WITNESSES: IIVVENTOI? A TTORNEY UNITED STATES PATENT OFFICE.

FRANK H. ROGERS, OF GOLDEN, COLORADO.

-PITMAN.

SPECIFICATION forming part of Letters Patent No. 395,850, dated January 8, 1889.

Application filed May '7, 1888.

My invention relates to an improved construction of pitmen or other connecting rods and the connections therefor, and its objects are to furnish a pitman-rod and connections 1 of such construction that friction in the connecting parts shall be largely reduced, yet a reliable connection made,a connection haying capability of automatic lubrication, in which the connecting parts are readily and easily disassoeiatcd and as readily and easily reassembled, simple in construction, easily manufactured and economical .in such manufacture, durable, and reliable in operation; to which ends it consists in the features and combinations more particularly hereinafter described and claimed.

In the drawings are illustrated two forms of rods and connections embodying my invention, in which drawing Figure 1 is a side view of one form of: rod and connections; Fig. 2, a top view thereof; Fig. 3, an ei'llarged section of the ball or head of the ball-and-socket joint, taken on line :0 av, Fig. 1; Fig. 4-, a side View of a rod and another form of connections, involving, however, the same principles as the tirst form; Fig. 5, a top View thereof.

In the figures the rct'erence-numeral l indicates a pitman or other moving rod to be attached to and cause to move a second rod or other attached part. In Figs. 1 and 2 such second rod or part to be moved is represented by the shaft or red 2, carrying the head 3 for forming part of a ball-aml-socket joint, the other portion or socket thereof being formed upon or attached to the pitman 1. Such socket is formed by the two bars, strips, or straps, l 5, each of which is formed with'a concave-convex end, 6, the internal concavity of which is of about the same radius and curve as that of the exterior of the ball Of these one-in this instance strap 4-is permanently secured at the proper end of the Serial No. 273,043. (No model.)

rod 1 by screws, belts, or nails, whiletheother strap, 5, is removably attached thereto. Such strap 5 has a groove, 7, across its face near its rear end, such rear end being curved or beveled underneath, as shown in Fig. 2, and it is secured at such end to the rod 1 by a loop, 8, which takes in the groove 7 and which maybe fastened to the rod or merely be loose therearound and around the fixed strip or strap :i'. Near its front end the strap 5 has an elongated slot, 9, through which may pass the correspondingly-shaped head 11 of a bolt, 10, a pin or stop, 13, being situated to limit the movement of the bolt and its head in onedirection.

A latch-spring, 12, consisting of a strip of somewhat resilient metal, is secured at one end to the rod 1, its other end being at a small angle to the general line of its body, as seen in Fig. 2, in order that while such general line of the body is at an angle to the straps l and 5 the angled cnd may be parallel to and adapted to take upon or over the surface of the strap 5. Projecting from such strap, and in such position that the end of the bolt-head l] .larthest from the spring-latch 12 may impinge thm-eaga-insn is a stop-pin, 13. It now, after the bolt-head has been passed up through the slot 9, it be turned to bring its right-hand end (reference being had to Fig. 1) against such pin, its motion in that direction is limited, and if then the free end of latch-spring lflbe sprung in against the side of the bolt-head near its other end the bolt is prevented from turning in that direction, the spring-latch l2 and stop thus holding the bolt-head and bolt securely in the position shown in Fig. 1. While the spring-latch 12 is here shown, it is evident that any form of simple latch accomlishing the same end might be used, and, it desired, be pivoted upon strap 5 itself.

In assembling the parts, strap t being rigidly or permanently attached to red 1, the end of strap is slipped under the 'loop 8, the curved or beveled end aiding both in slipping it thereunder and removing it therefrom. The head 3 is laid in the concave socket 0 of strap 4, and strap 5 is laid down thereupon, the head 11 being passed through the slot 9 and then turned and locked by latch-spring 12 and stop 13. This firmly unites the parts together, they then forming a ball-andsocket vided for tightly closing the mouth of the chamber. From this chamber one or more (as many as maybe deemed necessary) passages, 16, lead to the exterior of the ball for conducting the lubricant to the bearing. Such passages should be so arranged that the lubricant does not iiow normal] y therefrom, but is thrown therein and thence thereout to the bearings by the jar or concussion or shake i To this end due to operation of the parts. the passages may start from above the normal level of lubricant in the chamber, as shown in full lines in Fig. $3, and thence incline downwardly, or they may start below such normal level and thence incline upwardly, with outlets above such level, as shown in dotted lines in the same figure.

\Vhen it is not desired to have the head 3 rigid upon or integral with a shaft or rod, but movably attached thereto, the same principles may be embodied in a combination similar to that shown in Figs. 4: and 5, wherein 17 is the part to be attached to and move with the pitman 1. This rod or shaft is forked at its end, 18 being the limbs or members of such fork. In this case the ball-head 3 has an aperture, 20, through it, (shown in dotted lines in Fig. 3,) in which is seated the pivotal pin 19, which is journaled in the limbs 18 of the fork of the part 17. In this modification the straps having the concavities ti 6, for forming the socket, are both shown the ordinary semi-fixed straps 4t and 5, secured upon rod 1 by the bolts 21. This is merely for the pun pose of. illustration, as the preferable form that shown in the other figures, preferably in i that greater case both of assembling and separating the parts is secured thereby.

\Yhile, as herein shown, the socket is attached to the pitman and theball to the part to be moved therewith or thereby, it is evident that this relation might be reversed and the head placed on the pi tman or other equivalent rod.

The constrm'tion herein described forms a very reliable and effective connection between two shafts or rods, and is well adapted presence of two witnesses.

for use wherever such a connection is desirtal or needed.

\Vhile what is herein termed the permae nently-attached strap 4- is shown as formed separately from the rod 1 and then attached thereto by extraneous means, it is evident that such strap :i: and the rod 1 might be formed together and be integral and homogeneous.

It will be noticed that the loop 8 and groove 7 form in effect a hinge for the rear end of the rcmoval'ile strap 5, and that any suitable form of hinge or pivot might be used in lieu thereof.

Having thus described my in vention,what I claim is 1. The combination of a pitman or other connecting rod, two straps thereon having concaved ends forming the socket of a joint, and a second rod to be connected to the pitman-rod and carrying the head or ball of a ball-j oin t, the head or ball havi n a cylindrically-shaped lubricant-reservoir in its interior, an inclined plug or stopper therefor, and a pas sage or passages leading thence to the bearing to be lubricated, substantially as set forth.

2. The combination of a pitman or other connecting rod, two straps, one permanently secured thereto and one removably secured thereto, both straps having concaved ends for forming a socket for a ball-and-socket joint, and a second rod or shaft carrying the head of the joint, said head having a cylindricallyshaped lubricant chamber or reservoir in its interior, provided with a stopper or plug and with one or more inclined passages leading thence to the bearing to be lubricated, substantially as set forth.

3. The combination of a rod or shaft carryin g the head or ball of a ball-and-socket joint, a pitman or other connecting rod, two straps, one permanently and one removably secured thereto and both formed with concaved ends for forming the socket of the joint, a loop for securing the rear end of the removable strap to the rod, a bolt seated against the fixed strap and having an elongated head adapted to pass through a correspondinglyshaped slot in the removable strap, and means for locking such head in holding position, substantially as set forth.

4. The combination of a pitman or other driving rod, a second rod or shaft, and a balland-socket joint uniting them, consisting of a socket attached to one rod and a head or ball carried by the other, said head or ball having an interior cylindrically-shaped oil or lubricant chamber, a plug or stopper closing" the same, and an inclined passage or passages leading from the chamber to the bearing to be lubricated, substantially as set forth.

In testimony whereof l aiiix my signature in FRANK II. ROGERS.

\Vi tncsses:

Z. F. \VILBER, B. L. POLLOCK. 

